private Dictionary <string, Color> GetGradientDictColor(BiColorGradientTheme gradientTheme)
{
Dictionary <string, Color> result = new Dictionary <string, Color>();
double minValue = gradientTheme.MinValue;
double maxValue = gradientTheme.MaxValue;
double interval = (maxValue - minValue) / 5;
double leftVal = 0;
double rightVal = 0;
if (interval == 0)
{
interval = 1;
}
for (int index = 0; index <= 4; index++)
{
leftVal = minValue + interval * index;
rightVal = minValue + interval * (index + 1);
string range = string.Format(" {0}~{1}", leftVal.ToString(), rightVal.ToString());
Color color = new Color();
color = gradientTheme.GetColorByValue(minValue + index * interval);
result.Add(range, color);
}
return(result);
}
public Color GetColorByValue(double value)
{
double[] values = _stops.Keys.ToArray();
if (value < values.First())
{
return(_stops.First().Value);
}
else
{
for (int i = 0; i < values.Length - 1; i++)
{
double a = values[i];
double b = values[i + 1];
if (value >= a && value < b)
{
BiColorGradientTheme bcgm = new BiColorGradientTheme {
MinValue = a, MaxValue = b, MinColor = _stops[a], MaxColor = _stops[b]
};
return(bcgm.GetColorByValue(value));
}
}
return(_stops.Last().Value);
}
}
